Glass cutting machine



May 10, 1932 J. E. WALKER 1,857,748

GLASS CUTTING MACHINE Filed June 22. 1922 Job): E )f1/di 'er.

www l I l um Patented May 10, 1932 entre@ stare-s e ,weer terrien JOHN WALKER, or ATLANTA, GEORGIA', Assrenon, Br' MnsnEfAssfreNrvLENTs,

ro THE GLY-MER MANUFACTURING coivrrANY, ornnnvnr,ooronAno, A conne RATION or coLoRAno GLASS commey MACHINE Application ieaqu'ne 22,

i This invention relates to'improvernen'ts 'in devices for cutting round h olesin plate' glass, andfhas special referenceto adevice adapted for use in cutting circular openings in autoobjectionable on account of thel great amount of `labor, that is involved in removing the windshield and replacing the same.

It is the object of this invention to produce a device r`by meansV of which the desiredhole 2O may be cut through the glasso'f'the "windshield, withoutremoving the same :tromthe automobile.

lln order to more clearly describe my inventiOn, l-shall have'referenceto the-accom-v o panyingdrawings, in'which Fig. lis anfelevation ofthe devicemountj` A is provided end or 'cap 12. 'When lit lis `desired to unofve the "sh atti` against thetension of l the spring 15,-the vcap 1'2 isf'rotatedsoas to tendxtoiunscrew l it iro'in the Lend.

ed imposition for use,

of arrow 1, Fig. 2; V

-F ig.2 is a side elevation lookin'gin the direction of arrow 2, Fig. '1, thefgl-'assof the windshield being shown in section;

viewed in the direction y Fig. 3 is a sectiontaken on'the line 3 3, l Fig. 1, viewed in the direction ofthe arrows;

Fig. 4 is a detail view similarto Fig.'` '3,

but showingthe cutter'held in the retracted `position Fig.v 5is a viewlikeFig. 4, but showin'gthe cutter releasedrandat its'v forward llimit of movement;

Fig 6--6,

arrows. y n

The same reference numerals will be'us'ed to designate thev same parts throughout the several views.

`il\lumerpal lr represents the glass nthrough which .it is desired to out a round hole, and 2 represents my improved cutting machineV `as a whole. My cuttingmachine consists of a ltubular body member having anfenlarged 6 is a cross section taken onthe line Fig. 4, viewed in the direction of the p i piece'ot brasspipefhaving.longitudinal cuts 192e. "ser'ilfno, "570,66'6.

lhead 3 Whichis formed `integralwith "a plate 4. The head has afcylindrical cavity. .5 therein, the purpose otjvwhich will hereinafter appear. The main portion'otheihody member has a cylindrical opening 6, between which and the cavity 5 there is abearing. portion l7 ywhich may-be Vintegral asishown, or formed ot c1-separate pieceoil bronze. -To the outer .end of the 'main portion lof the body member secure avsecond bearing. which has a portion 9` yof reduced diameter'fand adapted to tit snugly withinthe vendo .the Acyiind'ical opening by a 6 'and is held Jin lplace screw `l0. rEhe outer end'of bearingfSV is provided with square threads 11 of about one-quarter inchpitch.Y A cap 1.23isirotatably mounted on thev bearing S'La'nd'is internally threaded to vengage with threadsll.

lvou-nted' in the bearings??` and `8 isa shaft Vlo which is provided 4intermediate Vfits l.ends withl ae collar 114. A springlf of'thehelical compression i-type, 4surrounds :sh-aft alrand abuts its endsfagainst collar 114 and Abearing 9 Vand' thereby tends to f move the :shaft :and collar in the direction `.of the bearing '7; Shaft lentends out-beyond thecap12wand with-a pm 16 which eng-agesthel asit inovestofthe right it will carryshaftl jalon'gwith it. 1 `iihe eXtremefright-or outer able motorymay-be Vcoupledorfthetpurpose otrotating the shaft. vThe -inner orleitahand end of the `shaft 13; is provided withra` reduc-ed threaded portion 1.9.to whichfthecutter 2O :is connected. rihis cutter is oiitheusuall construction and 'consists,br.iefiy, Tof a-tubullar The plate i is or considerable size,being aboutA twice-as'wide the` dirameterx'of the '80 of the b'earing"8,eand

cemented tothe outersurtac'e thereof. l lSe- I "cured to the rear'surface-oitplate T4 is aU- Vsha'pled member 23,' theiree end of'whichcarthreaded bolt 24 whose 'function itis ries a ofv which may be connected to a supply of paste and water, or to a supply of water, and pipe 30 serves as a drain. I preferably fill Athe cavity 5 and the inside of cutter 20 with a thick emery powder'paste before the machine issecured in place. Pipe 30 is then stoppered as with a cork, and water introduced through i pipe 29 in sufficient quantity to form a paste of the proper consistency.

The operation of my machine is as follows The cavity 5 is filled with emery paste as above described and the machine clamped in place on the glass by means of the U-shaped vclamp 23, bolt 24 and plate 26. Cap 12 is then turnedy until it is as far to the left as it will go; this permits the spring 15 to function and to produce the necessary pressure. lVater is then introduced through pipe 29 to from a paste that will freely flow.

Y It will be noted that the cavity 5 containing the paste and the cutter 20, is sealed so that the paste cannot run out even if it becomes very thin, as the rubber 22 is pressed v firmly against the glass. A source of power, such as anelectric drill operating mechanism, is connected to shaft 13 by means of a shaft having a universal joint couplinglS, and Y the cutter is rapidly rotated. YTheemery cooperates with the cutter, and very soon the latter has cut its way through the glass. The machine is then stopped, pipe 30 is opened,

and the Vpaste is permitted todrain out of the cavity 5, after which cap 12 is .unscrewed be employed.

and enga-ges pin 16 to move the shaft 13 to the right, thus withdrawing the cutter from theglass. Bolt 24 is then released and the machine removed. The cut out piece of glass is then removed from the cutter and the machine is ready to be applied to a glassfor the purpose of cutting another hole. The cutter 20will, of course, wear away, and in order to compensate for this I have made the threaded portion 19 longer than necessary so that vwashers may bel added between the shoulder on theshaft and the cutter, whenever kdesired. Y

For the specific purposeY for which this Y machine is now constructed, the hole is slightly less than two and one-half (2l/2) inches,

' but my machine is as well adaptedto cut any Y other sizes of holes.V The object of putting the cutter near one end of the plate 4 instead of near the center is so that a hole may be cut near the windshield frame.

15 to function.

cut, the screw cap or nut V12 being moved toward the left to permit the spring 15 to function, thus leaving a space between the closed end of the nut and the stop piii16.

In Fig. 4 the cutter is not in contact with the glass, but is nevertheless held in the retracted position; this is due to the fact that rthe nut orcap 12'is moved toward the right or in the reverse position from that shown in Figs. 2 and 3.` Hence, in Fig. 4, the nut is in Contact with the pin.

InV Fig. k5 the' cutter is at its limit of movement toward the left, the screw cap jor nutV beingin the same position as' in Figs. 2Y and 3; but in the latterthe nut is spaced from the pin, while in Fig. 5 the nut and pin are in contact. f 'i Attention is called to the fact that two additional short pipes or nipplesV 31 and 32 are illustrated in Fig. 1. The ,nipples 31 and 32 occupy positions at right angles Vto those designated 29 and 30 and are, of course, stopped or closed when'the device is in use in the Vposition shown in the drawing. But the device may be-Vapplied to the end instead of the top of the windshield glass, in which event the yoke 23 would occupy a position at right angles to that shown inthe drawing. The nipples 3l and 32 would then occupy vertical positions and would be used for inlet and drainage purposes instead of the nipples 29 and 30; the latter would then be stopped or closed. In the drawing these Stoppers or closures for the nipples are' not illustrated. They maybe screw caps or 'any other form of stopperV desired. It will be noted that in the drawings the nipples are exteriorly threaded so that screw caps may in the Operation lOrth@ device a should b remembered that before clamping the struc- Y ture to the windshield or glass for beginning the cutting operation, the cuttery should be retracted by adjusting the nut or screw cap 12 to cause kit-to occupy the position shown l in Fig. 4. However, as soon as the device is clamped yin position for use, as showny in Figs. 1 to 3, inclusive, the nut or screw 'cap must be adjustedv to occupy the position I.

shown in Figs.V 2 and 3 to permit the spring Having now describedV inventiomwhat I claim as new is f A 1. A machine of the character described,

'comprising,rin combination, a tubular body Y member having anv enlarged cavity at one y end said cavity being closed to confine an abradant when the machine isinuse, a 'cutter rotatably mounted in said'cavity, means coinprising a spring tending to move said cutter in an outward direction with respect to the cavity, means whereby said cutter may be rotated, means for clamping said machine against the surface of a piece of glass said means including a U-shaped yoke, and means for moving said cutter against the tension of the spring. p

2. A machine of the character described, comprising, in combination, a tubular body member having an enlarged cavity at one end, an elongated cylindrical chamber at the other end, a bearing at each end of said chamber, a shaft having a collar rotatably mounted in said chamber and having one end eX- tending into said cavity, a cutter secured to said shaft within said cavity, a spring within said chamber and surrounding said shaft, Y

said spring being under compression and having its ends abutting said collar and one bearing, means for rotating said shaft and cutter, means for moving said shaft and cutter against the action of said spring, a plate secured to the outer end of said cavity, and means for clamping said machine to a glass to be cut.

3. A device of the character speciied, comprising, in combination, a support having spaced bearings, means for clamping, said support to a glass said means including a U-shaped yoke connected with the support, a cutter rotatably mounted in said bearings, means comprising a spring tending to move said cutter towards the glass, means for applying an abrasive paste to the cutter and the glass, and means whereby the cutter may be rotated. y

et. A device of the character specified, comprising a support having ahollow head closed to confine an abradant when the device is in use, a cutter rotatably mounted therein, means for automatically movingv the cutter when the device is in use, a hollow cutter rotatably mounted in the head, and having an operating spindle journaled in the support, a spring carried by the spindle and under tension to impart feeding stress to the cutter to keep pace with the cutting act, and means mounted on the support and connected in` operative relation with the spindle to retract the cutter when moved in one direction and to release the cutterto allow the spring to function' when moved in the opposite direction.

7. A cutter of the class described, comprising a support having a hollow head adapted to receive and hold an abrasive substance when the device is in use, a hollow cutter rotatably mounted in the head and having an` operating spindle journaled in the support,

a spring carried by the spindleandunder tension to impart feeding stress to the cutter to keep ,pace with thev cutting act, a nutl mounted to travel on the support and adapted to engage a stop on the spindle to retractthe cutter when moved in one 'direction andl to release the cutter tofallow the spring to function when movedV in the opposite direction. l

8. A device ofthe character specified com- Y prising, in combination, a cutter, a bodyhaving a cavity therein for enclosing said cutter and an abradant, means for positively retracting said cutter into said body away from cutting position, means whereby thecutter may be rotated, and means for securing the device to a piece of glass to be cut.

In testimony whereof I aiiiX my signature. v JOI-IN EUGENE WALKER. Y

longitudinally, means for rotating the cutter, and means cooperating with the cutter for securing the material to be cut in place,

said means including a U-shaped yoke.

5. A cutter of the class described, comprising a support having a hollow head open adjacent to the material to be Vcut said head being closed to confine an abradant when the cutter is in use, means for clamping the support in place including a U-shaped yoke, a hollow cutter located in said head rotatably mounted in said support and under tension to feed automatically toward the glass to keep pace with the cutting act, means movable on the support in one direction and connected in operative relation to retract the cutter, said means being movable in the opposite direction to permit the feed tension on the cutter to function during the glass cutting operation.

' 6. A cutter of the class described, comprising a support having a hollow head adapted to receive and hold an abrasive substance 

